Georgia Fiero Club Forum
All Things Fiero => Tech Tips, Tech Questions => Topic started by: HarryT on September 17, 2012, 05:54:11 pm
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On the scouting run for the RFTH it developed a strange noise pulling into the restaurant at Tellico Plains. We could not tell what it was. It went away and for the RFTH 17 rally it showed up again at the end of the run. It was there all the way home and is still there now. It is really bad now. It sounds like someone is shaking a coffee can full of marbles under the intake manifold. It is there at idle and gets louder when revved up. I have not been able to go any further because of the rain. I can't feel anything with my hand on the valve covers. The engine runs good, Engine temp. was and is normal, oil pressure around 45 at idle and 65 at 2000 but it is now idleing at around 1500, not its usual 800. (Cow's Patoot, I don't think a PCV valve will help this one :-X)
Any and all suggestions would be appreciated;
Harry
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Take a piece of hose long enough to reach from the end of your hand to your ear. That will be long enough to stretch straight from the valve cover(s) to your ear. Start the car and let it idle. While holding one end to your ear, keeping the hose as straight as possible, move along the valve covers. This will help you better locate the source of the noise.
I suspect from what you wrote that one or more rocker arms may be worn through. I've had this happen with a similar sound. The valve keeper was mushroomed so the valve did not fall into the cylinder (luckily)!
After removing the valve cover then spark plug, I was able to use an air hose to pressurize the cylinder, remove the bad rocker arm, use a valve spring compressor to R & R the valve keeper and spring cap, replace the rocker arm, spark plug and re-adjust the rocker arm.
This method wasn't too hard. I hope it's a simple fix.
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Roger;
I have a stethascope with a long aluminum rod on the end instead of the sound cup that doctors use just for this purpose but I could not find it today. I just remembered it is in a drawer in the basement of my coach. Tomorrow I will get it out and scope out the engine to determine where the noise is coming from. I suspected collapsed lifters when I heard it, thinking the oil had thinned out due to heat and extreme stress and that it would quiet down when the engine and oil cooled this morning, but it didn't, so lifters, rocker arms or push rods may have decided to quit working after 25 years. I will keep all informed as to what I find.
Thanks for your suggestions;
Harry
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Harry, even though you're getting good readings on your oil pressure gauge, I never trust them. They're notorious for being inaccurate. If you have one, install a mechanical gauge in place of the sender to check what the true reading is as compared to the electric sender. I do that periodically just to be sure my electric sending unit isn't failing.
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Hi All;
All the noise was coming from the water pump. :) What a relief. Put on a new pump and it sounds better than it has in months. It must have been getting noisier for quite a while.
We are now ready for another run. ;D ;D
Harry
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Glad to hear it was something so simple...not that a water pump is really that simple on these, but much more so than valve work.
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;D
I like good (better than expected) news!
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We are now ready for another run. ;D ;D
Harry
8) 8)
Anybody up for a fall color tour sometime in October? Maybe 3rd weekend?
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Anybody up for a fall color tour sometime in October? Maybe 3rd weekend?
Certainly! Have any idea what area would be good? How about up where Harry and Karin live? We could then pull in at their house for coffee and cake. :D
Just an idea........hehehe.
\D
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It sounds like it might work if y'all don't mind driving 1/2 mile on a gravel road. We don't drink coffee so that would have to be worked out.
Lets think on it;
Harry and Karin
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If you have a coffee maker we could bring the grinds ;D
\D
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Just what I had in mind. I was thinking about asking Harry and Karin to give us a guided tour of Northern South Carolina and Western North Carolina.
How about making it an all day tour through some places we haven 't been before?
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I'm in....
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We can work a new Fiero route out with some nice scenic stops. Like I said before, we don't drink coffee so we don't even have a coffee maker. Someone will have to bring one. You all know our schedule, so we were thinking about meeting somewhere for lunch like the Cornucopia in Cashiers and then taking a 3 or 4 hour run ending up at our place. We can kick this around and see what comes up.
Harry and Karin
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I like
\D
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Cornucopia? Before we go there again, I need to find a law enforcement agency that covers that area and a locksmith that can get there the same day.
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Huh?
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I'm confused.
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Let me see if I can straighten out the confusion. Charlie at one of our runs lost his checkbook at the Cornucopia Restaurant and on another run locked his keys in his car. We could not find a Police station in the area and could not get a locksmith to come for a few hours. Fortunately Charlie was able to get into his car through the sunroof. See what you miss when you don't go on all of the fun runs.
Harry
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When I lost my checkbook, we couldn 't find a police department listing in the phone book, nor did the Cornucopia know how to contact them. I called the fire department and they didn't have a number, but told me to call 911. The county Sheriff's Dept. wouldn't come out.
Then I locked my keys in the car and the closest locksmith was in Murphy, NC., some 3 hours away.
We've gotten way off subject. Glad we all helped Harry to find out it was his water pump making the noise. What say start a new thread in the Club News section? If you want, Harry, you can lock this one down.
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I was going to suggest we start a new thread for another run, so I will shut this one down.
Harry